Btw Gregg,

I took a look at that diff case. Oh yeah... it's visible to the naked eye. The casing (you can tell) is definately machine cut. There is evidence of plastic burrs on each one of the diffs I built.

I took 600 grit sandpaper to all of them on a flat hard surface as suggested. I too think this will prevent any leak problems.

although, that paper gasket seems next to worthless, although, I know a very important part. I think it's promising there won't be any leaks. I didn't see reason to buy a new gasket.